CN210735193U - Industrial engineering warehouse management conveyor - Google Patents

Abstract

The utility model provides an industrial engineering storage management and conveying device, comprising: a frame body, a first roller, a protective frame, a first connecting frame rod, a connecting plate, a pallet frame, a second roller, a through hole, a fixing column, a fixing Plate, first fixed seat, second connecting rod, sprocket, movable rod, nut, pin, connecting cylinder, hydraulic cylinder, first pedal, second pedal, sprocket connecting rod, runner, chain fixing a block, a second fixing seat, a chain, a chain fixing cylinder, a bolt, a sleeve rod, and a rotating roller; a through hole is opened on the right top of the right top of the frame body, and the through hole and the frame body are integrated; A first roller is provided, and the first roller and the frame are connected by bolts; the utility model improves an industrial engineering storage management and conveying device, and has the advantages of small device volume, flexible movement, and can meet the needs of some actual situations. Therefore, the problems and deficiencies raised in the background art of the present invention are effectively solved.

Description

An industrial engineering warehouse management conveying device

technical field

The utility model relates to the technical field of storage conveying devices, in particular to a storage management conveying device for industrial engineering.

Background technique

With the rapid development of the current social economy, all walks of life are constantly accelerating the speed of development, people's quality of life and living standards are also constantly improving, both people's life and work have gradually realized modernization and intelligence, The same is true for the warehousing industry. Warehousing and transportation usually load the items into the boxes first, and transport them to the shelves in the storage area for storage. When they are shipped, they are removed from the storage shelves and delivered to trucks and other transportation vehicles to be transported out of the warehouse. The effectiveness of space utilization in the storage area will affect the overall production efficiency and cost. Specifically, the more finished boxes stored in the same storage space, the higher the effectiveness of the storage space utilization.

Storage and transportation devices often use pallets as a tool for stacking, handling, assembling and transporting unit loads of goods. At present, the commonly used storage and transportation vehicles mainly include hydraulic pallet trucks, forklifts, and trolleys. It is not flexible enough. When the space is narrow, it often cannot meet the demand. The traditional trolley cannot meet the needs of some actual situations. For example, when the goods on the transport vehicle need to be loaded and unloaded to a certain height, the lifting force is increased, and the negative force of the sliding mechanism is reduced. At the same time, it is easy to tilt forward, causing the sliding mechanism to be disengaged or loose, which reduces the work efficiency and other problems.

In view of this, the existing problems are studied and improved, and an industrial engineering warehouse management and conveying device is provided, which aims to solve the problem and improve the practical value through this technology.

Utility model content

The purpose of this utility model is to provide an industrial engineering storage management and conveying device, so as to solve the problems and deficiencies that the device proposed in the above-mentioned background technology is large in volume, not flexible enough in activity, and cannot meet the needs of some actual situations.

In order to achieve the above purpose, the utility model provides an industrial engineering storage management and conveying device, which is achieved by the following specific technical means:

An industrial engineering storage management conveying device, comprising: a frame body, a first roller, a protective frame, a first connecting frame rod, a connecting plate, a pallet frame, a second roller, a through hole, a fixing column, a fixing plate, a first fixing Seat, second connecting rod, sprocket, movable rod, nut, pin, connecting cylinder, hydraulic cylinder, first pedal, second pedal, sprocket connecting rod, runner, chain fixing block, second fixing seat, chain, chain fixing cylinder, bolts, sleeve rods, and rotating rollers; a through hole is opened on the right top of the right top of the frame body, and the through hole and the frame body are integral structures; a first roller is arranged in the through hole , and the first roller is connected with the frame body by bolts; a fixing column is arranged in the middle position of the top right end of the frame body, and the fixing column and the frame body are connected by welding; a connecting rod, and the first connecting rod and the frame body are connected by welding; the back of the first connecting rod is provided with a chain fixing cylinder, and the chain fixing cylinder and the first connecting rod are connected by welding; The chain fixing cylinder is provided with bolts, and the bolts are connected with the chain fixing cylinder by means of threads; the bottom end of the chain fixing cylinder is provided with nuts, and the nuts and the bolts are connected by means of threads; a pin column; a second fixing seat is arranged above the first connecting rod, and the second fixing seat is connected with the frame body through a runner; the left and right ends of the second fixing seat are provided with connecting plates, and the connecting plates It is connected with the second fixed seat by welding; a runner is arranged under the left side of the top of the connecting plate, and the runner and the connecting plate are connected in a movable way; a runner is arranged above the left side of the bottom end of the connecting plate, And the runner and the connecting plate are connected in a movable way; the top of the connecting plate is provided with a protective frame, and the protective frame and the connecting plate are connected by welding; a sleeve rod is arranged under the right side of the top of the connecting plate, and The sleeve rod and the connecting plate are connected in a fixed manner; the sleeve rod is provided with a pallet rack, and the pallet rack and the sleeve rod are connected in a sleeve manner; the top of the pallet rack is provided with a rotating roller, and the rotating roller It is connected with the pallet frame through bearings; a second connecting rod is arranged above the second fixing seat, and the second connecting rod is connected with the frame body by welding; the middle position of the top left side of the right side of the frame body is set There is a fixing plate, and the fixing plate is connected with the frame body by welding; the top of the fixing plate is provided with a hydraulic cylinder, and the hydraulic cylinder and the fixing plate are connected by bolts; the bottom side of the hydraulic cylinder is provided with a first foot pedal and The second pedal is provided with a movable rod at the top of the hydraulic cylinder; a sprocket connecting rod is provided in the middle of the top of the movable rod, and the sprocket connecting rod and the movable rod are connected by bolts; the left and right ends of the sprocket connecting rod All are provided with sprockets, and the sprockets and the sprocket connecting rods are connected in a movable way; a chain is arranged in the sprockets, and one end of the chain is connected with the chain fixing block in a fixed way; the other end of the chain is connected with the top of the bolt connected by a fixing method; a fixing seat is provided on the outer side of the left end of the frame body, and the fixing seat and the frame body are connected by welding; a connecting cylinder is arranged in the fixing seat, and the connecting cylinder and the fixing seat are connected by welding. ; The outer end of the connecting cylinder is provided with a first There are two rollers, and the second roller is connected with the connecting cylinder in a fixed manner.

As a further optimization of the technical solution, the pallet rack of an industrial engineering storage management conveying device of the present invention has a ┗-shaped structure, and the pallet rack is set as an up and down lifting device through a hydraulic cylinder, a sprocket, and a chain and a runner. A circular through hole matched with the sleeve rod is arranged under the vertical top of the pallet frame.

As a further optimization of the technical solution, the frame body of an industrial engineering storage management and conveying device of the present invention has an L-shaped structure, and the frame body is set as a moving device through the first roller and the second roller.

As a further optimization of the technical solution, the top of the pallet rack of an industrial engineering storage management conveying device of the present invention is provided with N through holes, and the through holes are all provided with rotating rollers, and the rotating rollers and the rack are connected by bearings. for the rolling device.

As a further optimization of the technical solution, the second fixing seat of an industrial engineering storage management and conveying device of the present invention has a rectangular structure, and a rectangular through hole is opened in the middle of the second fixing seat, and the outer wall of the through hole is welded with a Two chain fixing blocks.

As a further optimization of this technical solution, an industrial engineering storage management and conveying device of the present invention is provided with four said runners, and the runner fixed on the lower left side of the top of the connecting plate is arranged on the outside of the frame body, and is fixed on the connecting plate The runner on the upper left side of the bottom end is arranged on the inner side of the frame body.

As a further optimization of the technical solution, an industrial engineering storage management conveying device of the present invention is provided with two chain fixing cylinders, and the inner wall of the chain fixing cylinder is provided with threads matching with bolts.

Due to the application of the above-mentioned technical solutions, the present invention has the following advantages compared with the prior art:

1. The utility model has a ┗-shaped structure through the pallet rack, and the pallet rack is set as an upper and lower lifting device through a hydraulic cylinder, a sprocket, and a chain and a runner, which is conducive to the convenience of the staff to place the storage items in different heights. The storage location greatly reduces the labor intensity of the staff, saves time and improves efficiency.

2. The arrangement of the second fixing seat of the protective frame and the connecting plate and the pallet rack of the present invention is beneficial to the pallet rack during the lifting and lowering process, the items placed on the pallet rack are more stable, and the occurrence of placing on the pallet rack is avoided. The situation in which items are dropped on the shelf during the lifting and lowering process.

3. The utility model is provided with N through holes through the top of the pallet frame, and the through holes are all provided with rotating rollers. The rotating roller and the frame body are connected by bearings to form a rolling device, which is beneficial for the device to reduce the burden of loading and unloading items for the staff. Labor intensity, improve work efficiency.

4. Through the improvement of an industrial engineering storage management conveying device, the present utility model has the advantages of small size, flexible activity, and can meet the needs of some actual situations, thereby effectively solving the problem of the present utility model in the background technology item. Issues and deficiencies raised.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide further understanding of the present invention, and the schematic embodiments of the present invention and descriptions thereof are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the frame structure schematic diagram of the utility model;

Fig. 3 is the left side view structure schematic diagram of the utility model;

4 is a schematic diagram of the connection structure between the protective frame and the second fixing seat of the present invention;

Figure 5 is a schematic diagram of the structure of the pallet rack of the present invention;

FIG. 6 is a schematic diagram of the connection structure between the connecting plate, the runner and the second fixing seat of the present invention.

In the figure: the frame body 1, the first roller 2, the protective frame 3, the first connecting rod 4, the connecting plate 5, the pallet frame 6, the second roller 7, the through hole 8, the fixing column 9, the fixing plate 10, the first A fixed seat 11, the second link rod 12, the sprocket 13, the movable rod 14, the nut 15, the pin 16, the connecting cylinder 17, the hydraulic cylinder 18, the first pedal 19, the second pedal 20, the sprocket connection The rod 21 , the runner 22 , the chain fixing block 23 , the second fixing seat 24 , the chain 25 , the chain fixing cylinder 26 , the bolt 27 , the sleeve rod 28 , and the rotating roller 29 .

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example.

It should be noted that, in the description of the present utility model, unless otherwise specified, the meaning of "plurality" is two or more; the terms "upper", "lower", "left", "right", " The orientation or positional relationship indicated by "inside", "outside", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility. The novel and simplified description does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

Furthermore, the terms "first," "second," "third," etc. are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

Meanwhile, in the description of the present invention, unless otherwise expressly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection ; It can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Please refer to FIG. 1 to FIG. 6 , the present utility model provides a specific technical implementation scheme of a storage management and conveying device for industrial engineering:

An industrial engineering storage management and conveying device, comprising: a frame body 1, a first roller 2, a protective frame 3, a first connecting frame rod 4, a connecting plate 5, a pallet frame 6, a second roller 7, a through hole 8, a fixing Column 9, fixed plate 10, first fixed seat 11, second connecting rod 12, sprocket 13, movable rod 14, nut 15, pin 16, connecting cylinder 17, hydraulic cylinder 18, first pedal 19, first Two pedals 20, sprocket connecting rod 21, runner 22, chain fixing block 23, second fixing seat 24, chain 25, chain fixing cylinder 26, bolt 27, sleeve rod 28, rotating roller 29; the top right side of the frame body 1 A through hole 8 is opened on the right side, and the through hole 8 and the frame body 1 have an integrated structure; a first roller 2 is arranged in the through hole 8, and the first roller 2 and the frame body 1 are connected by bolts; the right side of the frame body 1 The middle position of the top is provided with a fixed column 9, and the fixed column 9 is connected with the frame body 1 by welding; the vertical middle position of the left side of the frame body 1 is provided with a first connecting rod 4, and the first connecting rod 4 is connected with the frame body. 1 are connected by welding; the back of the first connecting rod 4 is provided with a chain fixing cylinder 26, and the chain fixing cylinder 26 and the first connecting rod 4 are connected by welding; the chain fixing cylinder 26 is provided with a bolt 27, and The bolt 27 is connected with the chain fixing cylinder 26 by means of threads; the bottom end of the chain fixing cylinder 26 is provided with a nut 15, and the nut 15 and the bolt 27 are connected by means of threads; the bottom end of the nut 15 is provided with a pin 16; A second fixing seat 24 is arranged above the rod 4, and the second fixing seat 24 is connected with the frame body 1 through the runner 22; The fixed seat 24 is connected by welding; a runner 22 is provided under the left side of the top end of the connecting plate 5, and the runner 22 is connected with the connecting plate 5 by a movable way; And the runner 22 is connected with the connecting plate 5 in a movable way; the top of the connecting plate 5 is provided with a protective frame 3, and the protective frame 3 and the connecting plate 5 are connected by welding; a sleeve rod 28 is provided under the right side of the top of the connecting plate 5 , and the sleeve rod 28 and the connecting plate 5 are connected in a fixed manner; the sleeve rod 28 is provided with a pallet rack 6, and the pallet rack 6 and the sleeve rod 28 are connected by a nesting method; the top of the pallet rack 6 is provided with a rotating roller 29, and the rotating roller 29 and the pallet frame 6 are connected by bearings; a second connecting rod 12 is arranged above the second fixing seat 24, and the second connecting rod 12 is connected with the frame body 1 by welding; the frame A fixing plate 10 is arranged in the middle position of the top left side of the body 1, and the fixing plate 10 is connected with the frame body 1 by welding; the top of the fixing plate 10 is provided with a hydraulic cylinder 18, and the hydraulic cylinder 18 is connected with the fixing plate 10 by bolts. ; The bottom side of the hydraulic cylinder 18 is provided with a first pedal 19 and a second pedal 20, and the top of the hydraulic cylinder 18 is provided with a movable rod 14; the middle position of the top of the movable rod 14 is provided with a sprocket connecting rod 21, and the sprocket connecting rod 21 and the movable rod 14 are connected by bolts; the left and right ends of the sprocket connecting rod 21 are provided with a sprocket 13, and the sprocket 13 and the sprocket connecting rod 21 are connected in a movable way; a chain 25 is arranged in the sprocket 13, and one end of the chain 25 is connected with the chain fixing block 23 by a fixed way; the other end of the chain 25 is connected with the top of the bolt 27 by a fixed way; A fixing seat 11 is provided, and the fixing seat 11 and the frame body 1 are connected by welding; a connecting cylinder 17 is arranged in the fixing seat 11, and the connecting cylinder 17 and the fixing seat 11 are connected by welding; the outer end of the connecting cylinder 17 is provided There is a second roller 7, and the second roller 7 is connected with the connecting cylinder 17 in a fixed manner.

Specifically, the pallet rack 6 has a ┗-shaped structure, and the pallet rack 6 is set as an up and down lifting device through the hydraulic cylinder 18 and the sprocket 13 and the chain 25 and the runner 22. The pallet rack 6 is provided below the vertical top with a The circular through holes matched with the sleeve rods 28 are convenient for the staff to place the storage items in storage positions of different heights, which greatly reduces the labor intensity of the staff, saves time and improves efficiency.

Specifically, the frame body 1 has an L-shaped structure, and the frame body 1 is set as a mobile device through the first roller 2 and the second roller 7, so that the staff can easily transport goods of different weights to the required position or equipment. .

Specifically, the top of the pallet frame 6 is provided with N through holes, and the through holes are provided with rotating rollers 29. The rotating rollers 29 and the frame body 1 are connected by bearings to form a rolling device, which is beneficial for the device to reduce the labor intensity of the staff when loading and unloading items. ,Improve work efficiency.

Specifically, the second fixing base 24 has a rectangular structure, and a rectangular through hole is formed in the middle of the second fixing base 24 , and two chain fixing blocks 23 are welded on the outer wall of the through hole.

Specifically, there are four runners 22 , and the runner 22 fixed on the lower left side of the top end of the connecting plate 5 is arranged on the outer side of the frame body 1 , and the runner wheel 22 fixed on the upper left side of the bottom end of the connecting plate 5 is arranged on the frame body 1 The inner side is beneficial for the device to rise and fall more smoothly.

Specifically, there are two chain fixing cylinders 26 , and the inner wall of the chain fixing cylinder 26 is provided with threads that cooperate with the bolts 27 , so that the chain 25 can be more firmly fixed.

Specific implementation steps:

When using the device, first move the device to the position of the goods to be loaded and unloaded through the first roller 2 and the second roller 7, place an appropriate amount of the goods on the pallet rack 6, and the staff pushes the rack body 1 to move the goods to the place to be placed. In the storage location or on the conveying equipment, when the pallet rack 6 needs to be raised, step on the second pedal 20, the movable rod 14 drives the sprocket connecting rod 21 and the sprocket 13 to rise, and the sprocket 13 drives the The chain 25 rises, the chain 25 drives the second fixed seat 24 to rise, and the first pedal 19 will make the pallet rack 6 drop down. Labor intensity, improve work efficiency.

To sum up: This kind of industrial engineering storage management and conveying device is set as an upper and lower lifting device through a hydraulic cylinder, a sprocket, and a chain and a runner, which is conducive to the convenience of staff to place storage items in storage positions of different heights. , greatly reduces the labor intensity of the staff, saves time, and improves efficiency. Through the setting of the second fixing seat of the protective frame and the connecting plate and the pallet rack, it is beneficial for the pallet rack to be placed on the pallet during the lifting and lowering process. The items on the rack are more stable, to avoid the situation that the items are placed on the pallet rack and fall during the lifting process. N through holes are opened through the top of the pallet rack, and the through holes are provided with rollers. The setting of the rolling device connected with the frame body through the bearing is beneficial to the device to reduce the labor intensity of the staff loading and unloading items, improve the work efficiency, and solve the problems that the device is large in size, and the movement is not flexible enough to meet the needs of some actual situations.

Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes and modifications can be made to these embodiments without departing from the principles and spirit of the present invention , alternatives and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (7)

1. An industrial engineering warehousing management conveying device, comprising: the device comprises a frame body (1), a first roller (2), a protective frame (3), a first connecting rod (4), a connecting plate (5), a supporting plate frame (6), a second roller (7), a through hole (8), a fixed column (9), a fixed plate (10), a first fixed seat (11), a second connecting rod (12), a chain wheel (13), a movable rod (14), a nut (15), a pin column (16), a connecting cylinder (17), a hydraulic cylinder (18), a first pedal (19), a second pedal (20), a chain wheel connecting rod (21), a rotating wheel (22), a chain fixed block (23), a second fixed seat (24), a chain (25), a chain fixed cylinder (26), a bolt (27), a sleeve rod (28) and a rotating roller (29); the method is characterized in that: a through hole (8) is formed in the right side of the top end of the right side of the frame body (1), and the through hole (8) and the frame body (1) are of an integrated structure; a first roller (2) is arranged in the through hole (8), and the first roller (2) is connected with the frame body (1) through a bolt; a fixing column (9) is arranged in the middle of the top end of the right side of the frame body (1), and the fixing column (9) is connected with the frame body (1) in a welding mode; a first connecting rod (4) is arranged in the vertical middle position on the left side of the frame body (1), and the first connecting rod (4) is connected with the frame body (1) in a welding mode; the back of the first connecting rod (4) is provided with a chain fixing cylinder (26), and the chain fixing cylinder (26) is connected with the first connecting rod (4) in a welding mode; a bolt (27) is arranged in the chain fixing barrel (26), and the bolt (27) is connected with the chain fixing barrel (26) in a threaded mode; the bottom end of the chain fixing cylinder (26) is provided with a nut (15), and the nut (15) is connected with a bolt (27) in a threaded mode; a pin column (16) is arranged at the bottom end of the nut (15); a second fixed seat (24) is arranged above the first connecting frame rod (4), and the second fixed seat (24) is connected with the frame body (1) through a rotating wheel (22); the left end and the right end of the second fixed seat (24) are respectively provided with a connecting plate (5), and the connecting plates (5) are connected with the second fixed seat (24) in a welding mode; a rotating wheel (22) is arranged below the left side of the top end of the connecting plate (5), and the rotating wheel (22) is movably connected with the connecting plate (5); a rotating wheel (22) is arranged above the left side of the bottom end of the connecting plate (5), and the rotating wheel (22) is movably connected with the connecting plate (5); the top end of the connecting plate (5) is provided with a protective frame (3), and the protective frame (3) is connected with the connecting plate (5) in a welding mode; a loop bar (28) is arranged below the right side of the top end of the connecting plate (5), and the loop bar (28) is fixedly connected with the connecting plate (5); the sleeve rod (28) is provided with a supporting plate frame (6), and the supporting plate frame (6) is connected with the sleeve rod (28) in a sleeving manner; the top end of the supporting plate frame (6) is provided with a rotating roller (29), and the rotating roller (29) is connected with the supporting plate frame (6) through a bearing; a second side link (12) is arranged above the second fixed seat (24), and the second side link (12) is connected with the frame body (1) in a welding mode; a fixing plate (10) is arranged in the middle of the left side of the top end of the right side of the frame body (1), and the fixing plate (10) is connected with the frame body (1) in a welding mode; a hydraulic cylinder (18) is arranged at the top end of the fixing plate (10), and the hydraulic cylinder (18) is connected with the fixing plate (10) through a bolt; a first pedal (19) and a second pedal (20) are arranged at the bottom side of the hydraulic cylinder (18), and a movable rod (14) is arranged at the top end of the hydraulic cylinder (18); a chain wheel connecting rod (21) is arranged in the middle of the top end of the movable rod (14), and the chain wheel connecting rod (21) is connected with the movable rod (14) through a bolt; the left end and the right end of the chain wheel connecting rod (21) are respectively provided with a chain wheel (13), and the chain wheels (13) are movably connected with the chain wheel connecting rod (21); a chain (25) is arranged in the chain wheel (13), and one end of the chain (25) is fixedly connected with the chain fixing block (23); the other end of the chain (25) is fixedly connected with the top end of the bolt (27); a fixed seat (11) is arranged on the outer side of the left end of the frame body (1), and the fixed seat (11) is connected with the frame body (1) in a welding mode; a connecting cylinder (17) is arranged in the fixed seat (11), and the connecting cylinder (17) is connected with the fixed seat (11) in a welding mode; the outer end of the connecting cylinder (17) is provided with a second roller (7), and the second roller (7) is connected with the connecting cylinder (17) in a fixed mode.

2. The industrial engineering warehousing management conveying device of claim 1, wherein: the supporting plate frame (6) is of an L-shaped structure, the supporting plate frame (6) is arranged to be an up-down lifting device through a hydraulic cylinder (18), a chain wheel (13), a chain (25) and a rotating wheel (22), and a circular through hole matched with a sleeve rod (28) is formed in the lower portion of the vertical top end of the supporting plate frame (6).

3. The industrial engineering warehousing management conveying device of claim 1, wherein: the support body (1) is of an L-shaped structure, and the support body (1) is arranged into a moving device through a first roller (2) and a second roller (7).

4. The industrial engineering warehousing management conveying device of claim 1, wherein: n through-holes are formed in the top end of the supporting plate frame (6), rotating rollers (29) are arranged in the through-holes, and the rotating rollers (29) are connected with the frame body (1) through bearings to form a rolling device.

5. The industrial engineering warehousing management conveying device of claim 1, wherein: the second fixing seat (24) is of a rectangular structure, a rectangular through hole is formed in the middle of the second fixing seat (24), and two chain fixing blocks (23) are welded to the outer wall of the through hole.

6. The industrial engineering warehousing management conveying device of claim 1, wherein: the four rotating wheels (22) are arranged, the rotating wheels (22) fixed below the left side of the top end of the connecting plate (5) are arranged on the outer side of the frame body (1), and the rotating wheels (22) fixed above the left side of the bottom end of the connecting plate (5) are arranged on the inner side of the frame body (1).

7. The industrial engineering warehousing management conveying device of claim 1, wherein: the chain fixing cylinders (26) are provided with two threads, and the inner walls of the chain fixing cylinders (26) are provided with threads matched with the bolts (27).

Images